Documents disponibles écrits par cet auteur

A novel approach to the geometallurgical modelling of the Collahuasi grinding circuit / O. M. Alruiz in Minerals engineering, Vol. 22 N° 12 (Octobre 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 12 (Octobre 2009) . - pp. 1060–1067 Titre : A novel approach to the geometallurgical modelling of the Collahuasi grinding circuit Type de document : texte imprimé Auteurs : O. M. Alruiz, Auteur ; S. Morrell, Auteur ; C. J. Suazo, Auteur Année de publication : 2009 Article en page(s) : pp. 1060–1067 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Grinding  Modelling  Simulation  Sulphides  ore Résumé : Compañía Minera Doña Inés de Collahuasi SCM initiated the development of a new geometallurgical model to characterize its Rosario deposit in terms of its comminution circuit capacity and flotation performance. The comminution component of the model is now complete and is described in detail in this article. The model uses a combination of simulation and power-based approaches to relate ore hardness and flotation feed size to grinding circuit throughput. Ore hardness values are provided by Collahuasi’s block model which has been populated with ore characterisation data derived from Bond ball work index tests, JK drop-weight tests and SMC Tests® on diamond drill cores. The influences of planned and unplanned maintenance downtime are taken into account both in terms of frequency and duration. The accuracy of the model is demonstrated using weekly production data taken from the period January–December 2008, showing an average relative error of 5.2% and an R2 value of 0.95. The model is now in successful routine use at the mine for planning purposes and is currently in the process of being further developed to incorporate the response of the flotation circuit. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509000995 [article] A novel approach to the geometallurgical modelling of the Collahuasi grinding circuit [texte imprimé] / O. M. Alruiz, Auteur ; S. Morrell, Auteur ; C. J. Suazo, Auteur . - 2009 . - pp. 1060–1067. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 12 (Octobre 2009) . - pp. 1060–1067 Mots-clés : Grinding  Modelling  Simulation  Sulphides  ore Résumé : Compañía Minera Doña Inés de Collahuasi SCM initiated the development of a new geometallurgical model to characterize its Rosario deposit in terms of its comminution circuit capacity and flotation performance. The comminution component of the model is now complete and is described in detail in this article. The model uses a combination of simulation and power-based approaches to relate ore hardness and flotation feed size to grinding circuit throughput. Ore hardness values are provided by Collahuasi’s block model which has been populated with ore characterisation data derived from Bond ball work index tests, JK drop-weight tests and SMC Tests® on diamond drill cores. The influences of planned and unplanned maintenance downtime are taken into account both in terms of frequency and duration. The accuracy of the model is demonstrated using weekly production data taken from the period January–December 2008, showing an average relative error of 5.2% and an R2 value of 0.95. The model is now in successful routine use at the mine for planning purposes and is currently in the process of being further developed to incorporate the response of the flotation circuit. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509000995

Predicting the overall specific energy requirement of crushing, high pressure grinding roll and tumbling mill circuits / S. Morrell in Minerals engineering, Vol. 22 N° 6 (Mai 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 6 (Mai 2009) . - pp. 544–549 Titre : Predicting the overall specific energy requirement of crushing, high pressure grinding roll and tumbling mill circuits Type de document : texte imprimé Auteurs : S. Morrell, Auteur Année de publication : 2009 Article en page(s) : pp. 544–549 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Grinding  SAG  milling Résumé : In a previous paper [Morrell, S. 2008a. A method for predicting the specific energy requirement of comminution circuits and assessing their energy utilisation efficiency. Minerals Engineering 21(3), 5–9] an approach was described which enabled the specific energy of tumbling mills such as Autogenous (AG), Semi-autogenous (SAG) and ball mills to be estimated from laboratory-derived ore characterisation data. The following paper extends this approach to encompass jaw, gyratory and cone crushers as well as High Pressure Grinding Rolls (HPGR). The technique is applied to three different comminution circuits and their overall specific energies are compared. All of the calculations involved are described in detail in an appendix. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509000077 [article] Predicting the overall specific energy requirement of crushing, high pressure grinding roll and tumbling mill circuits [texte imprimé] / S. Morrell, Auteur . - 2009 . - pp. 544–549. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 6 (Mai 2009) . - pp. 544–549 Mots-clés : Grinding  SAG  milling Résumé : In a previous paper [Morrell, S. 2008a. A method for predicting the specific energy requirement of comminution circuits and assessing their energy utilisation efficiency. Minerals Engineering 21(3), 5–9] an approach was described which enabled the specific energy of tumbling mills such as Autogenous (AG), Semi-autogenous (SAG) and ball mills to be estimated from laboratory-derived ore characterisation data. The following paper extends this approach to encompass jaw, gyratory and cone crushers as well as High Pressure Grinding Rolls (HPGR). The technique is applied to three different comminution circuits and their overall specific energies are compared. All of the calculations involved are described in detail in an appendix. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509000077

Predicting the specific energy required for size reduction of relatively coarse feeds in conventional crushers and high pressure grinding rolls / S. Morrell in Minerals engineering, Vol. 23 N° 2 (Janvier 2010) 

Public ISBD [article]  in Minerals engineering > Vol. 23 N° 2 (Janvier 2010) . - pp. 151-153 Titre : Predicting the specific energy required for size reduction of relatively coarse feeds in conventional crushers and high pressure grinding rolls Type de document : texte imprimé Auteurs : S. Morrell, Auteur Article en page(s) : pp. 151-153 Note générale : Génie Minier Métallurgie Langues : Anglais (eng) Mots-clés : Comminution  Crushing Index. décimale : 622 Industrie minière Résumé : In a previous paper (Morrell, 2009. Predicting the overall specific energy requirement of crushing, high pressure grinding roll and tumbling mill circuits. Minerals Engineering 22 (6), 544–549), an approach was described to predict the specific energy of a range of tumbling mill and crushing/high pressure grinding rolls (HPGR) circuits. In the case of crushing and HPGR circuits, recently acquired data have enabled this approach to be extended to coarser particle size reduction situations. This is achieved through the use of a size-dependent hardness parameter. Crushing and HPGR conditions are described where the use of this parameter should improve the accuracy of specific energy predictions. A worked example is also given. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDR-4XDKC9K-1&_user=6 [...] [article] Predicting the specific energy required for size reduction of relatively coarse feeds in conventional crushers and high pressure grinding rolls [texte imprimé] / S. Morrell, Auteur . - pp. 151-153. Génie Minier Métallurgie Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 2 (Janvier 2010) . - pp. 151-153 Mots-clés : Comminution  Crushing Index. décimale : 622 Industrie minière Résumé : In a previous paper (Morrell, 2009. Predicting the overall specific energy requirement of crushing, high pressure grinding roll and tumbling mill circuits. Minerals Engineering 22 (6), 544–549), an approach was described to predict the specific energy of a range of tumbling mill and crushing/high pressure grinding rolls (HPGR) circuits. In the case of crushing and HPGR circuits, recently acquired data have enabled this approach to be extended to coarser particle size reduction situations. This is achieved through the use of a size-dependent hardness parameter. Crushing and HPGR conditions are described where the use of this parameter should improve the accuracy of specific energy predictions. A worked example is also given. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDR-4XDKC9K-1&_user=6 [...]